Fake is a utility that enables the IP address be taken over by bringing up a second interface on the host machine and using gratuitous arp.
You can download it from the following link: https://packetstormsecurity.com/files/download/13240/fake-1.0.1.tar.gz
Source: https://packetstormsecurity.com/files/13240/fake-1.0.1.tar.gz.html